All-in-one domain control power battery pack system, discharging method and automobile
By setting up independent power domain control units and discharge panel circuits in the battery pack system, the problems of complex structure and limited external discharge functions of the all-in-one control system are solved, and the effect of simplifying maintenance, reducing costs and improving user experience is achieved.
Patent Information
- Application Number
- CN202311145030.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-06
- Publication Date
- 2025-03-07
AI Technical Summary
In the prior art, the all-in-one control system has a complex structure, which affects the performance of the vehicle and has high maintenance costs. The high-voltage distribution unit lacks an electric drive system interface that supports the electric four-wheel drive solution, which limits the function and usage conditions for external discharge.
An all-in-one domain control power battery pack system is designed. The power domain control unit is set inside a freely detachable individual case in the battery pack unit, including an independent domain control motherboard, driving unit, power supply unit and power distribution unit. The discharge panel circuit is connected to the discharge panel circuit through the discharge panel port to realize AC charging and external discharge functions.
The maintenance process is simplified, the maintenance cost is reduced, the vehicle's performance and user experience are improved, and the flexibility and efficiency of external discharge are achieved.
Smart Images
Figure CN119568030A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of all-in-one domain-controlled power battery packs, and specifically relates to an all-in-one domain-controlled power battery pack system, a discharge method and a vehicle. Background Art
[0002] In the prior art, the high-voltage control system of new energy vehicles mainly adopts a distributed and all-in-one solution configuration integrated with the drive. Among them, when a distributed solution is adopted, when the chassis space is occupied by a large-volume battery pack, there is not enough space in the whole vehicle to lay out the high-voltage components, resulting in a scattered layout of the high-voltage components, making the cooling pipelines and the high and low voltage wiring harnesses complicated and chaotic, thereby increasing the cost of using the wiring harness; at the same time, it brings great challenges to the reliability, installation convenience, safety and EMC of the whole vehicle.
[0003] On the one hand, the all-in-one drive solution has high requirements for the installation space of the assembly, which increases the difficulty of layout; on the other hand, it will increase the unsprung mass of the vehicle, affecting the vehicle's handling performance; in addition, as the volume of the all-in-one drive assembly increases, the installation space of the battery will decrease, which is not conducive to expanding the battery capacity to achieve an increase in driving range. The all-in-one drive solution will also increase the difficulty of high-voltage system maintenance. Once the high-voltage control system fails, the all-in-one drive assembly must be disassembled from the vehicle for system maintenance, which will also cause the replacement of the all-in-one drive assembly, greatly increasing maintenance costs and resource waste, and increasing the difficulty and cost of high-voltage control system maintenance.
[0004] The high-voltage power distribution unit is only designed with air-conditioning compressor ports, PTC heating ports, single drive system ports, and fast and slow charging ports. It lacks the electric drive system interface that supports the electric four-wheel drive solution. A small distribution box needs to be set up to power the front and rear electric drive systems, which increases the cost of the vehicle. The on-board charger OBC only supports the slow charging port for external discharge. The discharge gun signal must be detected to activate the external discharge function, which means it can only be used when the car is parked and not charging. It cannot realize the functions of discharge and discharge while charging during driving, which limits the use conditions of external discharge and reduces the customer experience. Summary of the invention
[0005] The purpose of the present invention is to provide an all-in-one domain-controlled power battery pack system, which is used to solve the problems in the prior art that the all-in-one control system has a complex structure, affects the performance of the entire vehicle, and has a high maintenance cost.
[0006] Another object of the present invention is to provide a discharge method for an all-in-one domain-controlled power battery pack system.
[0007] Another object of the present invention is to provide a vehicle.
[0008] The technical solution of the present invention to solve the technical problem is: An all-in-one domain-controlled power battery pack system comprises a power domain control unit and a battery pack unit, wherein the power domain control unit is arranged inside a freely detachable separate shell in the battery pack unit, and the power domain control unit comprises an independently arranged domain control mainboard, a drive unit, a power supply unit and a distribution unit, wherein the domain control mainboard comprises a vehicle controller VCU, a transmission controller TCU, a battery management system BMS, and a motor control system MCU; the drive unit comprises a motor controller drive module and an IGBT module; the power supply unit comprises a DC converter DCDC and an on-board charger OBC; the distribution unit comprises a high-voltage distribution unit PDU and a battery management unit BDU, and the distribution unit is provided with a main drive system port and an auxiliary drive system port; the main drive system port is connected to the motor controller drive module through high-voltage distribution, and the motor controller drive module is connected to the main drive motor.
[0009] The power distribution unit is also provided with an air conditioning compressor port, a heater PTC port, a motor controller port, a discharge panel port, a DC fast charging port and an AC slow charging port.
[0010] The power distribution unit is connected to the discharge panel circuit through the discharge panel port. The discharge panel circuit includes an electrical appliance interface, an AC charging seat interface, and an on-board charger AC interface. A relay is set on the live branch of the AC charging seat interface, and an overload protector is set on the live branch of the electrical appliance interface.
[0011] A method for discharging an all-in-one domain-controlled power battery pack system, wherein the specific steps of discharging are: S1: The on-board charger OBC detects that the discharge panel button is valid and sends the discharge panel button status to the vehicle controller; S2: The vehicle controller VCU determines whether the vehicle meets the power-on conditions. If so, proceed to step S3; if not, end the discharge; S3: The battery management system receives the high-voltage power-on request sent by the vehicle controller VCU and completes the battery high-voltage power-on process; S4: The battery management system sends a discharge request signal to the on-board charger, the vehicle enters the AC discharge mode, and sends CAN information to the vehicle controller; S5: The vehicle controller VCU determines whether the vehicle has a fault. If so, the onboard charger OBC stops discharging. If not, proceed to step S6; S6: The vehicle controller VCU determines whether the discharge stop signal is valid. If so, proceed to step S7; if not, continue to discharge; S7: After stopping discharge, when the battery management system detects that the discharge current is less than the limit value, the main positive relay and the main negative relay are cut off, and the status is fed back to the vehicle controller VCU; S8: End the discharge.
[0012] A car adopts an all-in-one domain-controlled power battery pack system.
[0013] The beneficial effects of the present invention are as follows: by disposing the power domain control unit inside a freely detachable separate shell in the battery pack unit, the power domain control unit includes independently arranged domain control mainboard, drive unit, power supply unit and distribution unit. The power domain control unit and the battery pack unit exist separately, which is convenient for disassembly, making maintenance simple. The domain control mainboard, drive unit, power supply unit and distribution unit inside the power domain control unit also exist independently and are spaced apart from each other by a partitioned arrangement, which not only makes the hardware structure between the parts more concise, but also makes the connection between the parts safer, thereby making maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the power domain control unit of the present invention; Figure 3 is a circuit schematic diagram of the power distribution unit of the present invention; Figure 4 is a circuit schematic diagram of the discharge panel of the present invention; Figure 5 It is a discharge flow chart of the present invention. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0016] Embodiment 1: like Figure 1 As shown, an all-in-one domain-controlled power battery pack system includes a power domain control unit 200 and a battery pack unit 100. The power domain control unit is arranged inside a freely detachable separate shell in the battery pack unit. The power domain control unit includes an independently arranged domain control mainboard 600, a drive unit 500, a power supply unit 400 and a distribution unit 300. The domain control mainboard 600 includes a vehicle controller VCU, a transmission controller TCU, a battery management system BMS, and a motor control system MCU; the drive unit 500 includes a motor controller drive module and an IGBT module; the power supply unit 400 includes a DC converter DCDC and an on-board charger OBC; the distribution unit 300 includes a high-voltage distribution unit PDU and a battery management unit BDU, and the distribution unit 300 is provided with a main drive system port and an auxiliary drive system port.
[0017] The main drive system port is connected to a motor controller drive module through high voltage power distribution, and the motor controller drive module is connected to a main drive motor.
[0018] like Figure 2 , Figure 3 As shown, the power distribution unit 300 is also provided with an air conditioning compressor port, a heater PTC port, a motor controller port, a discharge panel port, a DC fast charging port and an AC slow charging port.
[0019] The main and auxiliary drive motor systems are operated through the ports, and the AC slow charging port and external discharge port enable the vehicle to supply power to external 220V electrical appliances.
[0020] like Figure 4 As shown, the power distribution unit is connected to the discharge panel circuit through the discharge panel port. The discharge panel circuit includes an electrical appliance interface, an AC charging seat interface, and an on-board charger AC interface. A relay is arranged on the live branch of the AC charging seat interface to ensure that the vehicle socket and the discharge socket panel are controlled separately when the on-board charger discharges to the outside. The discharge panel can discharge alone or discharge in two ways at the same time. At the same time, it can realize discharging while charging and discharging while driving, meeting the user's power demand during parking, driving and charging.
[0021] An overload protector is set on the live branch of the electrical interface to achieve overcurrent protection for 220V electrical appliances. The discharge panel can be set with 220V / 16A and 220V / 10 A power interfaces as needed. In addition to the external discharge soft switch set on the large screen in the cab, a self-resetting waterproof button switch is set on the discharge panel, which can also be used to activate or shut down the external discharge function, so that the user can operate the self-resetting waterproof button switch in the cab or the rear cargo box to turn the external discharge function on or off.
[0022] The all-in-one domain control power battery pack system is divided into units, and the space of the all-in-one domain control unit and the space of the battery pack are independent of each other through the shell. This design can make better use of the installation space and is conducive to the subsequent expansion of the battery capacity to achieve an increase in cruising range.
[0023] The design of this all-in-one domain control power battery pack system can also reduce the difficulty of high-voltage system maintenance. When a high-voltage control system fails, it is only necessary to remove the domain control unit from the all-in-one domain control power battery pack to perform system maintenance, which greatly reduces maintenance costs.
[0024] Embodiment 2: like Figure 5 As shown, a method for discharging an all-in-one domain-controlled power battery pack system is provided, and the specific steps of discharging are as follows: S1: The on-board charger OBC detects that the discharge panel button is valid and sends the discharge panel button status to the vehicle controller; S2: The vehicle controller VCU determines whether the vehicle meets the power-on conditions. If so, proceed to step S3; if not, end the discharge; S3: The battery management system receives the high-voltage power-on request sent by the vehicle controller VCU and completes the battery high-voltage power-on process; S4: The battery management system sends a discharge request signal to the on-board charger, the vehicle enters the AC discharge mode, and sends CAN information to the vehicle controller; S5: The vehicle controller VCU determines whether the vehicle has a fault. If so, the onboard charger OBC stops discharging. If not, proceed to step S6; S6: The vehicle controller VCU determines whether the discharge stop signal is valid. If so, proceed to step S7; if not, continue to discharge; S7: After stopping discharge, when the battery management system detects that the discharge current is less than the limit value, the main positive relay and the main negative relay are cut off, and the status is fed back to the vehicle controller VCU; S8: End the discharge.
[0025] Among them, the request signal sent by the battery management system can be "discharge current", "discharge voltage", "maximum discharge current limit", etc. The CAN information sent is battery status, SOC, various alarm status, etc.
[0026] Embodiment 4: A car adopts an all-in-one domain-controlled power battery pack system.
[0027] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.
Claims
1. An all-in-one domain-controlled power battery pack system, characterized in that: It includes a power domain control unit and a battery pack unit. The power domain control unit is arranged in a freely detachable separate shell in the battery pack unit. The power domain control unit includes an independently arranged domain control mainboard, a drive unit, a power supply unit and a distribution unit. The domain control mainboard includes a vehicle controller VCU, a transmission controller TCU, a battery management system BMS, and a motor control system MCU; the drive unit includes a motor controller drive module and an IGBT module; the power supply unit includes a DC converter DCDC and an on-board charger OBC; the distribution unit includes a high-voltage distribution unit PDU and a battery management unit BDU, and the distribution unit is provided with a main drive system port and an auxiliary drive system port; the main drive system port is connected to the motor controller drive module through high-voltage distribution, and the motor controller drive module is connected to the main drive motor.
2. The all-in-one domain-controlled power battery pack system according to claim 1, characterized in that: The power distribution unit is also provided with an air conditioning compressor port, a heater PTC port, a motor controller port, a discharge panel port, a DC fast charging port and an AC slow charging port.
3. The all-in-one domain-controlled power battery pack system according to claim 2, characterized in that: The power distribution unit is connected to the discharge panel circuit through the discharge panel port. The discharge panel circuit includes an electrical appliance interface, an AC charging seat interface, and an on-board charger AC interface. A relay is set on the live branch of the AC charging seat interface, and an overload protector is set on the live branch of the electrical appliance interface.
4. A method for discharging the all-in-one domain-controlled power battery pack system according to claim 3, characterized in that: The specific steps of discharge are: S1: The on-board charger OBC detects that the discharge panel button is valid and sends the discharge panel button status to the vehicle controller; S2: The vehicle controller VCU determines whether the vehicle meets the power-on conditions. If so, proceed to step S3; if not, end the discharge; S3: The battery management system receives the high-voltage power-on request sent by the vehicle controller VCU and completes the battery high-voltage power-on process; S4: The battery management system sends a discharge request signal to the on-board charger, the vehicle enters the AC discharge mode, and sends CAN information to the vehicle controller; S5: The vehicle controller VCU determines whether the vehicle has a fault. If so, the onboard charger OBC stops discharging. If not, proceed to step S6; S6: The vehicle controller VCU determines whether the discharge stop signal is valid. If so, proceed to step S7; if not, continue to discharge; S7: After stopping discharge, when the battery management system detects that the discharge current is less than the limit value, the main positive relay and the main negative relay are cut off, and the status is fed back to the vehicle controller VCU; S8: End the discharge.
5. A car, characterized in that: An all-in-one domain-controlled power battery pack system is adopted as described in any one of claims 1-3.